Brazing 6061 aluminum alloy with Al-Si-Zn filler metals containing Sr

Dai, Wei; Xue, Songbai; Feng, Ji; Lou, J.; Sun, Bei; Shuiqing, Wang

doi:10.1007/s12613-013-0736-1

Cited by 26 publications

(14 citation statements)

References 15 publications

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“…The composition of the Al-6.5Si-20Cu-2.0Ni filler metal was close to the eutectic point of the Al-Si-Cu-Ni quaternary alloy, so the DTA curve of the filler metal was relatively gentle between 526.8 and 530.1 • C [4,15,19], and the melting temperature range of Al-Si-Cu-Ni filler metals was narrower than that of Al-Si-Cu. Compared with previous scholars' research on Al-10Si-15Cu-4Ni(∆T = 24.9 • C) [4], Al-8.5Si-25Cu-1.5Ni-0.2Re(∆T = 18.0 • C) [5], Al-10.8Si-10Ge(∆T = 61.0 • C) [10] and Al-6.5Si-42Zn-Sr (∆T = 28.1 • C) [11], the melting temperature ranges of the Al-6.5Si-20Cu, and Al-6.5Si-20Cu-(1.0, 1.5, 2.0) Ni filler metals were narrower, which will facilitate the filling of the joint gaps with the liquid filler metals during the brazing process [4,20].…”

Section: Melting Characteristics Of the Al-si-cu (Ni) Filler Metalmentioning

confidence: 55%

“…To solve the problem of an excessively high brazing temperature, in recent years, many researchers have developed a series of new low melting point, aluminum-based filler metals by alloying methods with the theoretical support of eutectic components of Al-Si, 2 of 14 Al-Cu, Al-Ge, Al-Zn, etc., and the corresponding properties have been studied [2,7,[10][11][12]. The addition of Ge to the Al-Si filler metal can narrow the melting point of the Al-Si-Ge filler metal, but the melting range of the filler metal will widen with increasing Ge content, and the fluidity of the filler metal will decrease.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, Ge is costly; as a result, Al-Si-Ge filler metal is not suitable for large-scale applications [10]. Dai et al [8,11] studied the Al-6.5Si-42Zn filler metal, the melting range of which was found to be 27.7 • C. When it was used to braze 6061 aluminum alloys, the joint tensile-strength was improved to 129 MPa compared with Al-Si filler metal. However, the content of Zn in Al-Si-Zn filler metal is too high, which easily causes the dissolution of the base metal and reduces the strength of the brazed joint.…”

Section: Introductionmentioning

confidence: 99%

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Research on a Low Melting Point Al-Si-Cu (Ni) Filler Metal for 6063 Aluminum Alloy Brazing

Peng

Zhu²,

Li³

et al. 2021

Applied Sciences

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A new type of low melting point Al-Si-Cu (Ni) filler metal for brazed 6063 aluminum alloy was designed, and the microstructure and properties of the filler metal were systematically studied. The results show that when the content of Cu in the Al-Si-Cu filler metal increased from 10 wt.% to 20 wt.%, the liquidus temperature of the filler metal decreased from 587.8 °C to 533.4 °C. Its microstructures were mainly composed of the α-Al phase, a primary Si phase, and a θ(Al2Cu) phase. After a proper amount of Ni was added to the Al-Si-20Cu filler metal, its melting range was narrowed, the spreading wettability was improved, and the microstructure was refined. Its microstructure mainly includes α-Al solid solution, Si particles, and θ(Al2Cu) and δ(Al3Ni2) intermetallic compounds. The results of the shear strength test indicate that the shear strength of the brazed joint with Al-6.5Si-20Cu-2.0Ni filler metal was 150.4 MPa, which was 28.32% higher than that of the brazed joint with Al-6.5Si-20Cu filler metal.

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Section: Melting Characteristics Of the Al-si-cu (Ni) Filler Metalmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on a Low Melting Point Al-Si-Cu (Ni) Filler Metal for 6063 Aluminum Alloy Brazing

Peng

Zhu²,

Li³

et al. 2021

Applied Sciences

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“…Al-Si-Zn alloy has been applied to filler on brazing joint the 6061 aluminum alloy, and as sprayer on a plaster substrate [14][15][16] . The main objective of this experiment is to investigate the cooling curve behavior, microstructure and hardness on Al-1.37Zn-1.19Si and Al-1.66Si-1.35Zn during solidification.…”

Section: Introductionmentioning

confidence: 99%

Cooling Rate, Hardness and Microstructure of Aluminum Cast Alloys

Akhyar

2018

Mater Sci Mater Rev

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This experiment investigated the cooling curve behavior, hardness and microstructure of two aluminum alloys produced by casting process. There are Al-1.37Zn-1.19Si and Al-1.66Si-1.35Zn derived from melting and alloying a pure aluminum with ADC12 (Al-Si) ingot. Cooling curve recorded from both those two alloys with pouring temperature at 710 oC and the mold temperature kept constant at 220 oC. The result shows, a freezing range of Al-1.37Zn-1.19Si alloy is 643–348 oC and Al-1.66Si-1.35Zn alloy is 621–401 oC. Then cooling rate obtained for Al-1.37Zn-1.19Si is 55.56 oC/S, and Al-1.66Si-1.35Zn is 30.09 oC/S. TThe higher hardness is 40.42 BHN at Al 1.66 Si-1.35Zn, while the lower value is 34.62 BHN on Al-1,37Zn-1,19Si alloy. The hardness value found higher when cooling rate is shorted. The number of silicon present on microstructure is highest in Al-1.37Zn-1.19Si alloy but the hardness value decreases. This is caused by the distribution of the silicon content in the alloy is irregular. It was found that the solidification rate had an effect on hardness, where the freezing rate obtained a high hardness value.

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“…Thus, alternative metals, such as zinc or copper, have been proposed to reduce the melting point of ller and improve the ller activity. [10][11][12][13][14][15][16][17] . However, the evaporation rate and harmful effects of zinc are higher than those of magnesium.…”

Section: Introductionmentioning

confidence: 99%

Aluminium-Silicon-Magnesium Filler Metal for Aluminium Vacuum Brazing Wettability and Characteristics of Brazing Microstructure

et al. 2016

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Mg 2 Si composite was added to Al-Si ller metal for aluminium alloy vacuum brazing via in situ synthesis. Spreading area method was used to measure the wettability of the brazing alloy on the parent metal in vacuum. The ller metal wetting area increased with increasing Mg 2 Si content. The compound within the interface was examined with an electron probe and the following results were obtained: Mg 2 Si content of the brazing interface was lower than that of ller metal, Mg 2 Si was distributed into both sides of the interface and arranged in block, grain and short rod-like shapes. Si crystal had a primarily needle-like structural arrangement. The elemental distribution on both sides of the interface was analysed using thread scanning method. A solid solution of Mg was formed in the interior parts of the grain in the parent metal. The solid solution content decreased as the distance from the interface increased.

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Brazing 6061 aluminum alloy with Al-Si-Zn filler metals containing Sr

Cited by 26 publications

References 15 publications

Research on a Low Melting Point Al-Si-Cu (Ni) Filler Metal for 6063 Aluminum Alloy Brazing

Research on a Low Melting Point Al-Si-Cu (Ni) Filler Metal for 6063 Aluminum Alloy Brazing

Cooling Rate, Hardness and Microstructure of Aluminum Cast Alloys

Aluminium-Silicon-Magnesium Filler Metal for Aluminium Vacuum Brazing Wettability and Characteristics of Brazing Microstructure

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